---Were you satisfied with the exam result? ---Not a ______. I should have done much ______.
Astronomers and scientists think that a black hole is a region of space ______ which matter has fallen and _______ which nothing can escape.
There’s no ________ from my bedroom window except for some factory chinmneys.
What a table! I’ ve never seen such a thing before. It is ______ it is long.
"On no account ____to feed the animals", the warning can be seen on the signboard in front of every cage.
Thinking ______ you know_______ in fact you don’t is a terrible mistake.